fix: getSpaceBoundaryIndiv stack overflow, add docs

error_templates/java/java.go

@@ -184,15 +184,21 @@ func getSpaceBoundaryIndiv(line string, idx int, defaultDirection spaceComputeDi
 	}
 
 	if defaultDirection == spaceComputeDirectionLeft {
+		// if idx is...
+		// 1. greater than 0
+		// 2. not a space character (if stopOnSpace is false)
+		// 3. or a space character (if stopOnSpace is true)
+		// then return the current index
 		if idx-1 >= 0 && ((!stopOnSpace && !isSpace(line, idx-1)) ||
 			(stopOnSpace && isSpace(line, idx-1))) {
 			return idx
 		}
 
+		// if idx is less than 0, return the current index
 		if idx-1 < 0 {
-			// check if the current index is not a space
-			if !isSpace(line, idx) {
-				// go to the reverse direction to get the nearest space
+			// check if the index next to the current index is a space
+			// if it is, then we go to the reverse direction to get the nearest space
+			if isSpace(line, idx+1) {
 				newIdx := getSpaceBoundaryIndiv(line, idx, spaceComputeDirectionRight)
 				return newIdx
 			}